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Can’t find TransactionNumber field from litium 7 in PaymentInfo object in litium 8
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Can’t find UnitListPrice, UnitCampaignPrice, DiscountPercentage from litium 7 in litium 8 ShipmentRow object
Did you check the Litium.Sales API reference?
Yes, but still can’t find DiscountPercentage
The order row contains the unit price for that products and the discounted prices are added as a separate row with a negative amount for the discount, see Discounts (litium.com)